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From "Corey J. Nolet (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2177) A scan time iterator to return the first N entries encountered for each row in the input range. (FirstNEntriesInRowIterator)
Date Sat, 13 Sep 2014 01:44:34 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14132454#comment-14132454
] 

Corey J. Nolet commented on ACCUMULO-2177:
------------------------------------------

I have this coded up and contributed to a different codebase at the moment. I'll take time
soon to get this ported over.

https://github.com/calrissian/accumulo-recipes/blob/master/commons/src/main/java/org/calrissian/accumulorecipes/commons/iterators/FirstNEntriesInRowIterator.java



> A scan time iterator to return the first N entries encountered for each row in the input
range. (FirstNEntriesInRowIterator)
> ----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ACCUMULO-2177
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2177
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: client
>            Reporter: Corey J. Nolet
>            Assignee: Corey J. Nolet
>            Priority: Minor
>              Labels: iterators
>
> I have found this iterator extremely useful when it is important to run a batch scan
over a bunch of different ranges but guarantee that a predefined number of results get returned
for each row.



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